BATTERY MANAGEMENT SYSTEM, BATTERY SYSTEM, AND HYBRID VEHICLE CONTROL SYSTEM

• Main Authors: SAKABE HIROSHI, NAKAO RYOHEI, OKAWA KEIICHIRO, KOMATSU DAIKI, YONEMOTO MASAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 14.09.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PERFORMING OPERATIONS; PHYSICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING; TRANSPORTING; VEHICLES IN GENERAL

PROBLEM TO BE SOLVED: To appropriately represent an internal resistance state for the battery being electrically conducted.SOLUTION: A battery management system 100 comprises a battery information acquiring unit 103, a voltage calculating unit 104, a current fluctuation amount calculating unit 109, and a resistance correction amount calculating unit 111. The battery information acquiring unit 103 acquires a voltage value V of the storage battery 101 being electrically conducted. The voltage calculating unit 104 acquires a battery voltage prediction value Vof the storage battery 101 being electrically conducted in a method different from the battery information acquiring unit 103. The current fluctuation amount calculating unit 109 calculates a current fluctuation amount dI/dt per unit time of the storage battery 101. The resistance correction amount calculating unit 111 corrects an equivalent circuit model representing an internal state of the storage battery 101 including a DC resistance component Rand a polarization resistance component Ron the basis of the comparison results of voltage V and the battery voltage prediction value Vand current fluctuation amount dI/dt.SELECTED DRAWING: Figure 1 【課題】通電中の電池に対して、内部抵抗の状態を適切に表す。【解決手段】電池管理システム１００は、電池情報取得部１０３と、電圧演算部１０４と、電流変動量演算部１０９と、抵抗補正量演算部１１１とを備える。電池情報取得部１０３は、通電中の蓄電池１０１の電圧値Ｖを取得する。電圧演算部１０４は、電池情報取得部１０３とは異なる方法により、通電中の蓄電池１０１の電池電圧予測値Ｖｍｏｄｅｌを取得する。電流変動量演算部１０９は、蓄電池１０１の単位時間当たりの電流変動量ｄＩ／ｄｔを演算する。抵抗補正量演算部１１１は、電圧値Ｖおよび電池電圧予測値Ｖｍｏｄｅｌの比較結果と、電流変動量ｄＩ／ｄｔとに基づいて、直流抵抗成分Ｒ０と分極抵抗成分Ｒｐとを含む蓄電池１０１の内部状態を表す等価回路モデルを補正する。【選択図】図１